Election workers check a driver’s license at the polls under North Carolina’s voter ID law during the March 15 primary election. (Photo:Chris Keane /Reuters/Newscom)

This article has been corrected to reflect that Judicial Watch President Tom Fitton suggested that up to 15 percent of the United States population is noncitizens. That number bore no relation to the number of noncitizens voting.

The Obama administration opposes states verifying citizenship status of registered voters. Inquiries into voter fraud are typically met with derision from both government and the media—and in at least one instance with prosecution. Prosecutors don’t prioritize voter fraud, while convictions only garner light sentences.

These are among the voter fraud problems facing the United States, experts noted this week, even as prominent voices on the left say such fraud is a myth.